Non-drip calking gun nozzle



1957 w. A. SHERBONDY NON-DRIP CALKING cum NOZZLE,

Filed May 9, 1955 INVENTOR.

W/LL/AM A. SHEQBONDY Ma i/n v {mm/L A 7'7UENEYS United States PatentNON-DRIP CALKING GUN NOZZLE William A. Sherbondy, Cleveland, OhioApplication May 9, 1955, Serial No. 506,903

6 Claims. (Cl. 222491) The present invention relates generally asindicated to a non-drip calking gun nozzle, and more particularly to anozzle assembly which may be operated just before the calking gun is setaside after use to prevent oozing or dripping of the calking compound asit gradually expands upon release of pressure.

The present invention is also concerned with, but not limited to,improvements in a plastic material-containing cartridge which is adaptedto be installed in a holder or calking gun, said gun being operative todispense the contents of the cartridge through a discharge spout ornozzle at one end of the latter or at one end of the gun.

As is well known, calking compounds and other similar plastic materialsare compressible to some degree when forced under pressure from acartridge or receptacle therefor, and, as a result, when the calking gunis laid aside after use, the compressed material slowly expands and thusoozes or drips from the end of the spout.

At the present time, calking compounds are marketed, to large extent, inthe form of scaled cylindrical cartridges having a closure member at oneend which constitutes a piston adapted to be moved in the cylinder bodyor receptacle of the cartridge to discharge the plastic material underpressure through a spout at the other end. Often, the spout end of thecartridge has a frangible sealing disc or the like thereacross which ispunctured as by a nail or other pointed implement or solely by thepressure exerted on the material.

In some instances, the spout is a part of the calking gun proper inwhich the cartridge is inserted, and usually the gun is provided with anoperating lever or trigger which operates a ratchet feed mechanism forincrementally forcing the head of a ratchet bar into engagement with theaforesaid piston of the cartridge.

It is one object of this invention to provide a novel form of dispensingnozzle for calking guns or for calking gun cartridges which eliminatessuch problem of oozing of the calking compound when the use of thecalking gun is discontinued.

Another object of this invention is to provide a valved spout or nozzlehaving a valve which is opened under the influence of the pressure ofthe calking material and which is adapted to be closed by actuation ofthe spout.

Another object of this invention is to provide a simple form of valvedspout assembly in which the valve element is an integral part of theassembly, and said valve element is operated by the flexing of the spouteither by finger or by means of a suitable mechanism on the gun orcartridge holder.

Other objects and advantages of the present invention will becomeapparent as the fol-lowing description proceeds.

To the accomplishment of the foregoing and related ends, the invention,then, comprises the features hereinafter fully described andparticularly pointed out in the claims, the following description andthe annexed drawing setting forth in detail a certain illustrativeembodiment of the invention, this being indicative, however, of

but one of a few of the various ways in which the principle of theinvention may be employed.

In said annexed drawing:

Fig. l is a fragmentary longitudinal cross-section view of the spout andof a calking gun cartridge and its holder, the cartridge being providedwith a non-drip nozzle;

Fig. 2 is a transverse cross-section view taken substantially along theline 2-2, Fig. 1;

Fig. 3 is a cross-section view showing how the spout is adapted to beflexed to operate the valve to closed position; and

Fig. 4 is a fragmentary side elevation view of a cartridge holderprovided with a mechanism which may be operated to axially retract thespout of the cartridge rather than tilting the same as in Fig. 3.

Referring now more particularly to the drawing, the calking guncartridge herein comprises a cylindrical receptacle 1 made of anydesired material, that is, metal, plastic, or the like, but preferablyof paper or cardboard which has an inner lining impervious to the oilsin the calking compound. Essentially, the cylindrical receptacle 1 maycomprise a length of mailing tube which has an internal plastic film orlayer which prevents penetration of the calking compound and alsoprevents access of air to the calking material therein.

One end of the receptacle 1 is closed by a close fitting metal stamping2 which, as hereinafter explained, constitutes a piston or plunger,movable longitudinally in the receptacle to discharge the calkingcompound from the other end.

The other end of the cylindrical receptacle is equipped with adispensing spout or nozzle assembly which includes complementary,interfitting metal stampings 3 and 4 provided with radially spaced axialflanges between which the end of the receptacle 1 is gripped by crimpingor rolling over the outer axial flange of ring 4, and further providedwith axially spaced radial flanges between which the flexible flange 5of a plastic spout 6 is securely gripped.

The central portion of the stamping 3 and said flexible flange 5 areformed so as to define a chamber 7, and the former is sheared along thepart-circular line 8 to provide a hinged valve 9 which is an integralpart of the stamping 3. I

The inner surface of the closure member 3 may have applied theretosealing film of varnish, lacquer, or the like, or a separate paper discadhered thereto.

The flange S terminates in a central tubular spout 6 which preferably iscut on a bias as shown at its front end and which is provided with anannular rib 10 at its rear end axially spaced from the valve element 9.

Said annular rib 10 is preferably of smaller diameter than the valve 9so as to be effective to move said valve from its open position as shownin dotted lines in Fig. l, to closed position of Figs. 1 and 3 when thespout 6 is tilted as shown in Fig. 3.

The holder 12 for the cartridge 1 is exemplarily shown herein ascomprising a flanged ring 14 secured at one end of a saddle or cartridgesupport 15. At the other end of said saddle 15 is secured the customarygun handle (not shown) to which a trigger is pivotally connected. Whenthe trigger is actuated, a ratchet mechanism in the gun incrementallyadvances the ratchet bar 16 and its head 17 toward the left.

When it is desired to load a cartridge 1 into the gun 12, the ratchetbar 16 with its head 17 may be withdrawn to the right to allow insertionof the cartridge spout 6 through the opening in ring 14 and positioningof the cartridge in the saddle 15. As evident, when the bar 16 and head17 is incrementally advanced to the left, the head 17 will engageplunger 2, and as the pressure on the calking compound in the receptacle1 builds up, the seal around valve 9 will be broken thereby and thevalve 3 9 will be swung to the Fig. 1 dotted position, whereupon thecalking material may flow around said valve 9, through the chamber 7,and out through the end of the spout 6.

When it is desired to set the gun aside, or when the use of the gun isdiscontinued, all that the operator has to do is to tilt the spout 6, aswith his thumb for example, as is shown in Fig. 3. The rib 10 engagesthe valve 9 and forces the same to closed position. It is to be notedthat, when the spout 6 is flexed as in Fig. 3, the volume of the chamber7 between the spout flange and the member 3 is much less than it is inthe normal operating position.

Therefore, the tilting of the spout 6 and flexing of flange 5 displacescalking material from the chamber 7, whereupon, when the thumb pressureis released and the spout 6 assumes its normal position, a void will becreated in such chamber 7.

Moreover, since the valve 9 is now in closed position, it willeffectively hold any slight pressure remaining on the material in thecartridge receptacle 1. However, even if the material in the receptacle1 should gradually leak through the valve 9, such leaking material willbe effective to first fill the void in the chamber 7; and, therefore,will not cause oozing or dripping from the end of the nozzle or spout 6.

Instead of tilting the spout 6, the closing action on the valve 9 may beeffected as by means of the valveactuating mechanism shown in Fig. 4wherein the spout 6 will be axially withdrawn toward the handle of thegun to press the valve 9 to closed condition. And, as fully disclosed inmy copending applications Serial Nos. 451,755 and 471,207, filed August24 and November 26, 1954, respectively, the spout 6 may be held in thisretracted position during the periods of non-use of the gun, whereuponthe valve 9 is positively held in its passageclosing position.

The mechanism shown in Fig. 4 comprises a plate 20 hinged to the endring 21 of the gun and provided with cars 23 adapted to engage the innerportion of flange 5 when plate 20 is swung by retraction of rod 24.

With respect to the tilting of the spout 6, it is to be noted that,because the rib is of smaller diameter than the valve 9, it will pressagainst the valve at a point spaced from the hinge regardless of thedirection of tilting of the spout 6. Likewise, because the hinge is ofsubstantial length between the ends of the shear line, pressure appliedby rib 10 at any point of the valve 9 will cause a closing of the samewithout twisting.

Other modes of applying the principles of the invention may be employed,change being made as regards the de tails described, provided thefeatures stated in any of 4 the following claims, or the equivalent ofsuch, be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a dispensing device for plastic material, the combination of areceptacle for plastic material provided with a central opening at oneend thereof, a hinged valve member for opening and closing such opening,and a tubular dispensing spout having a flexible, radially outwardlyextending flange which is peripherally secured at such receptacle end toform a chamber therewith,, said valve member being swung into suchchamber under the influence of pressure on the material in saidreceptacle for flow through said spout, said flange being laterallyflexible for flexing toward such receptacle end to displace through saidspout some of the material in such chamber and to engage and move saidvalve member to a position closing such opening.

2. The device of claim 1 wherein said flange terminates in an annularrib which engages and moves said valve member as aforesaid.

3. The device of claim 1 wherein said flange is thus flexed by tiltingsaid spout.

4. In a non-drip calking gun nozzle, the combination of a sheet metaldisc integrally formed with a hinged valve member for opening andclosing a central opening in said disc; and a tubular spout having aflexible, radially outwardly extending flange which is peripherallysecured to said disc to form a chamber therewith; said valve memberbeing adapted to be swung into such chamber for flow of calking materialthrough such opening, such chamber, and said spout; said flange beinglaterally flexible for flexing toward said disc to displace through saidspout some of the material in such chamber and to engage and move saidvalve member to a position closing such opening.

5. The nozzle of claim 4 wherein said flange terminates in an annularrib which engages and moves said valve member as aforesaid.

6. The nozzle of claim 4 wherein said flange is thus flexed by tiltingsaid spout.

References Cited in the file of this patent UNITED STATES PATENTS1,879,205 Gunn Sept. 27, 1932 1,933,646 Witt et a1. Nov. 7, 19332,441,704 Jackson May 18, 1948 2,565,699 Rieke Aug. 28, 1951 2,575,040Batzler- Nov. 13, 1951 2,657,832 Rose et al., Nov. 3, 1953

